Well in English it's actually 2 sounds (a+i) they just have them mixed into one letter :) Not unlike Russian where the reversed R is the same sounds just in re

Well in English it's actually 2 sounds (a+i) they just have them mixed into one letter :) Not unlike Russian where the reversed R is the same sounds just in reversed order (i+a) and it also means I. Polish prefers to have sounds separated so it's "ja". And it's never capitalized, English is very egocentric about it's pronouns :)